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iio: imu: inv_icm42607: Add Temp Support in icm42607
Add functions for reading temperature sensor data. Signed-off-by: Chris Morgan <macromorgan@hotmail.com> Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
This commit is contained in:
Chris Morgan
Jonathan Cameron
parent
55abd7edfb
commit
512d321b93
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@ -4,6 +4,7 @@ obj-$(CONFIG_INV_ICM42607) += inv-icm42607.o
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inv-icm42607-y += inv_icm42607_core.o
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inv-icm42607-y += inv_icm42607_gyro.o
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inv-icm42607-y += inv_icm42607_accel.o
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inv-icm42607-y += inv_icm42607_temp.o
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obj-$(CONFIG_INV_ICM42607_I2C) += inv-icm42607-i2c.o
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inv-icm42607-i2c-y += inv_icm42607_i2c.o
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@ -15,6 +15,7 @@
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#include <linux/types.h>
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#include "inv_icm42607.h"
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#include "inv_icm42607_temp.h"
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#define INV_ICM42607_ACCEL_CHAN(_modifier, _index, _ext_info) \
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{ \
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@ -40,6 +41,7 @@ enum inv_icm42607_accel_scan {
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INV_ICM42607_ACCEL_SCAN_X,
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INV_ICM42607_ACCEL_SCAN_Y,
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INV_ICM42607_ACCEL_SCAN_Z,
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INV_ICM42607_ACCEL_SCAN_TEMP,
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};
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static const struct iio_chan_spec_ext_info inv_icm42607_accel_ext_infos[] = {
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@ -54,6 +56,7 @@ static const struct iio_chan_spec inv_icm42607_accel_channels[] = {
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inv_icm42607_accel_ext_infos),
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INV_ICM42607_ACCEL_CHAN(IIO_MOD_Z, INV_ICM42607_ACCEL_SCAN_Z,
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inv_icm42607_accel_ext_infos),
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INV_ICM42607_TEMP_CHAN(INV_ICM42607_ACCEL_SCAN_TEMP),
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};
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static const int inv_icm42607_accel_scale_nano[][2] = {
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@ -187,6 +190,11 @@ static int inv_icm42607_accel_read_raw(struct iio_dev *indio_dev,
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switch (chan->type) {
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case IIO_ACCEL:
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break;
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case IIO_TEMP:
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if (mask != IIO_CHAN_INFO_SAMP_FREQ)
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return inv_icm42607_temp_read_raw(indio_dev, chan,
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val, val2, mask);
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break;
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default:
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return -EINVAL;
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}
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@ -15,6 +15,7 @@
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#include <linux/types.h>
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#include "inv_icm42607.h"
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#include "inv_icm42607_temp.h"
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#define INV_ICM42607_GYRO_CHAN(_modifier, _index, _ext_info) \
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{ \
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@ -40,6 +41,7 @@ enum inv_icm42607_gyro_scan {
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INV_ICM42607_GYRO_SCAN_X,
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INV_ICM42607_GYRO_SCAN_Y,
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INV_ICM42607_GYRO_SCAN_Z,
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INV_ICM42607_GYRO_SCAN_TEMP,
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};
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static const struct iio_chan_spec_ext_info inv_icm42607_gyro_ext_infos[] = {
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@ -54,6 +56,7 @@ static const struct iio_chan_spec inv_icm42607_gyro_channels[] = {
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inv_icm42607_gyro_ext_infos),
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INV_ICM42607_GYRO_CHAN(IIO_MOD_Z, INV_ICM42607_GYRO_SCAN_Z,
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inv_icm42607_gyro_ext_infos),
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INV_ICM42607_TEMP_CHAN(INV_ICM42607_GYRO_SCAN_TEMP),
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};
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static const int inv_icm42607_gyro_scale_nano[][2] = {
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@ -184,6 +187,11 @@ static int inv_icm42607_gyro_read_raw(struct iio_dev *indio_dev,
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switch (chan->type) {
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case IIO_ANGL_VEL:
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break;
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case IIO_TEMP:
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if (mask != IIO_CHAN_INFO_SAMP_FREQ)
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return inv_icm42607_temp_read_raw(indio_dev, chan,
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val, val2, mask);
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break;
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default:
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return -EINVAL;
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}
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99
drivers/iio/imu/inv_icm42607/inv_icm42607_temp.c
Normal file
99
drivers/iio/imu/inv_icm42607/inv_icm42607_temp.c
Normal file
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@ -0,0 +1,99 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2026 InvenSense, Inc.
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*/
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#include <linux/bitfield.h>
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#include <linux/cleanup.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/iio/iio.h>
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#include <linux/mutex.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include <linux/types.h>
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#include <linux/unaligned.h>
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#include "inv_icm42607.h"
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#include "inv_icm42607_temp.h"
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static int inv_icm42607_temp_read(struct inv_icm42607_state *st, s16 *temp)
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{
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struct inv_icm42607_sensor_conf conf = INV_ICM42607_SENSOR_CONF_INIT;
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struct device *dev = regmap_get_device(st->map);
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int ret, gyro_mode, accel_mode;
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unsigned int val;
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u8 raw[2];
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PM_RUNTIME_ACQUIRE_AUTOSUSPEND(dev, pm);
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ret = PM_RUNTIME_ACQUIRE_ERR(&pm);
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if (ret)
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return ret;
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guard(mutex)(&st->lock);
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/*
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* Check if both the gyro and accel are off and if so, enable one
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* of them. The temp sensor cannot be read if both the gyro and
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* accel sensor are off. Prefer to enable the accel over the gyro
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* as the datasheet says the gyro uses 5x more power and it has
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* a minimum run time of 45ms.
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*/
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ret = regmap_read(st->map, INV_ICM42607_REG_PWR_MGMT0, &val);
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if (ret)
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return ret;
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accel_mode = FIELD_GET(INV_ICM42607_PWR_MGMT0_ACCEL_MODE_MASK, val);
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gyro_mode = FIELD_GET(INV_ICM42607_PWR_MGMT0_GYRO_MODE_MASK, val);
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if (!gyro_mode && !accel_mode) {
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/* enable accel sensor */
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conf.mode = INV_ICM42607_SENSOR_MODE_LOW_NOISE;
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ret = inv_icm42607_set_sensor_conf(st, &conf, IIO_ACCEL);
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if (ret)
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return ret;
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}
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ret = regmap_bulk_read(st->map, INV_ICM42607_REG_TEMP_DATA1,
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raw, sizeof(raw));
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if (ret)
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return ret;
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*temp = get_unaligned_be16(raw);
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if (*temp == INV_ICM42607_DATA_INVALID)
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return -EINVAL;
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return 0;
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}
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int inv_icm42607_temp_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int *val, int *val2, long mask)
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{
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struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
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s16 temp;
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int ret;
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switch (mask) {
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case IIO_CHAN_INFO_RAW:
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ret = inv_icm42607_temp_read(st, &temp);
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if (ret)
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return ret;
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*val = temp;
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return IIO_VAL_INT;
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/*
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* T°C = (temp / 128) + 25
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* Tm°C = 1000 * ((temp * 100 / 12800) + 25)
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* scale: 100000 / 12800 ~= 7.8125
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* offset: 3200
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*/
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case IIO_CHAN_INFO_SCALE:
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*val = 7;
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*val2 = 812500000;
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return IIO_VAL_INT_PLUS_NANO;
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case IIO_CHAN_INFO_OFFSET:
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*val = 3200;
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return IIO_VAL_INT;
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default:
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return -EINVAL;
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}
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}
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38
drivers/iio/imu/inv_icm42607/inv_icm42607_temp.h
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38
drivers/iio/imu/inv_icm42607/inv_icm42607_temp.h
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@ -0,0 +1,38 @@
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2026 InvenSense, Inc.
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*/
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#ifndef INV_ICM42607_TEMP_H_
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#define INV_ICM42607_TEMP_H_
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#include <linux/bitops.h>
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struct iio_dev;
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struct iio_chan_spec;
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#define INV_ICM42607_TEMP_CHAN(_index) \
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{ \
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.type = IIO_TEMP, \
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.info_mask_separate = \
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BIT(IIO_CHAN_INFO_RAW) | \
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BIT(IIO_CHAN_INFO_OFFSET) | \
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BIT(IIO_CHAN_INFO_SCALE), \
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.info_mask_shared_by_all = \
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BIT(IIO_CHAN_INFO_SAMP_FREQ), \
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.info_mask_shared_by_all_available = \
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BIT(IIO_CHAN_INFO_SAMP_FREQ), \
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.scan_index = _index, \
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.scan_type = { \
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.sign = 's', \
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.realbits = 16, \
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.storagebits = 16, \
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.endianness = IIO_BE, \
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}, \
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}
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int inv_icm42607_temp_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int *val, int *val2, long mask);
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#endif
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